Performance information monitoring system, method and program

ABSTRACT

A performance information monitoring method using computers includes the steps of accepting information on a group relating to a first computer in the first computer; storing the accepted group information in a storage in the first computer; accepting performance information from a second computer in the first computer; comparing performance information of the second computer previously stored in a storage with the performance information received from the second computer in the first computer; judging whether or not the second computer is included in the information of the group when finding a difference between the performance information in the comparison result; and transmitting an instruction to the computer included in the group information to change a performance information collection interval according to the judgment result.

BACKGROUND OF THE INVENTION

The present invention relates to monitoring and collection ofperformance information concerning a computer system having resourcessuch as storage devices by using a computer.

One of related arts is to issue an instruction to increase a collectionfrequency of data to be managed from the next time when an abnormalvariation is found in the data to be managed (for example, refer toJP-A-2001-273336, pp. 3-5).

One of methods for collecting data from a controller is to collect datafrom one of controllers having a high rate of change of importantmonitoring data at a preferential rate (for example, refer toJP-A-7-282090, pp. 2-4).

In the related arts, no consideration was paid to the influences onother parts caused by a change in data when performance information isprovided to a user.

SUMMARY OF THE INVENTION

It is an object of the present invention to issue an instruction about adata collection interval according to the detected result of occurrenceof an input or output to/from disk area.

Another object of the performance information is to acquire informationaccording to user's designation.

A further object of the performance information is to provideperformance information easily understandable for a user.

In accordance with the performance information, the above objects areattained by providing a method for collecting performance informationusing computers, wherein a first computer accepts information about agroup to which the computer belongs and stores the accepted groupinformation in a storage, and when the first computer receivesperformance information from a second computer, compares the receivedperformance information with performance information previously storedin the storage, and found a change in the performance information on thebasis of the performance information comparison, the first computerjudges whether or not the second computer is included in the groupinformation and issues an instruction to the computer included in thegroup information to change an interval of collecting the performanceinformation.

Other objects and methods for solving the objects as disclosed in thepresent application will be apparent as the following description of theinvention advances as detailed with reference to preferred embodimentsof the invention as shown in accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an example of an agent program;

FIG. 2 is an example of a manager program;

FIG. 3 is an example of a host to be monitored and a program foroperating the host;

FIG. 4 is an example of a client program;

FIG. 5 is an example of data stored in a data storage 130;

FIG. 6 is an example of data stored in a data storage 230;

FIG. 7 is an example of operations of a volume management module 330;

FIG. 8 is an example of operations of a driver 350;

FIG. 9 is an example of operations of a data collection interval manager123;

FIG. 10 is another example of operations of the data collection intervalmanager 123;

FIG. 11 is an example of operations of the manager program;

FIG. 12 is another example of operations of the manager program;

FIG. 13 is an exemplary configuration of an entire system;

FIG. 14A is an example of display screen representation;

FIG. 14B is an example of information of user-designated group;

FIG. 15 is an example of information about a system configuration,volume and threshold associated with each other; and

FIG. 16 is an example of operations of the manager program.

DESCRIPTION OF THE EMBODIMENTS

The embodiments according to the present invention will be described indetail.

FIG. 1 shows an example of an agent program.

An agent program 100 includes a communication controller 110, a datacollection/management module 120, and a data storage 130.

The communication controller 110 has a function of transmitting andreceiving data when data transmission, wireless communication or thelike is carried out in a network such as a local area network (LAN).

The data collection/management module 120 includes a data collector 121,a data collecting object manager 122, and a data collection intervalmanager 123.

The data collecting object manager 122 manages information of an objectfrom which data is to be collected. Data to be collected includeinformation about disks or various types of storages (such as RAID(redundant arrays of inexpensive disks), DVD (digital versatile disk),MO (magneto optical disk), tape, switch), information about a computerfor managing such storages, and information about software or computerwhich utilizes such storages.

The data collection interval manager 123 has a function of receiving adata collection interval shortening event and shortening a datacollection interval, and also has a function of receiving a datacollection interval enlarging event and enlarging a data collectioninterval.

The word “event” as used herein means information to be transmitted andreceived by a program (or computer). Details of information included inthe event will be explained when an event generator included in eachprogram is explained.

The data collector 121 has a function of collecting data on the basis ofinformation held in the data collecting object manager 122 and datacollection interval manager 123.

The data collector 121 has a function of storing collected data in thedata storage 130 in an order of time series. How capacity type dataacquired by the data collector 121 are stored in the data storage 130will be explained in detail in connection with an exemplary case byreferring to FIG. 5.

The data storage 130 has a function of transmitting data stored in thedata storage 130.

FIG. 2 is an example of a structure of a manager program.

A manager program 200 includes a communication controller 210, a datacollection/management module 220, a data collector 221, a datacollecting object manager 222, a data collection interval manager 223,an acquired data time information manager 224, a data storage 230, adata change information management module 240, a data change detector241, and an event generator 242.

The communication controller 210 has a function of transmitting data tothe agent program 100 according to a request from the data collector 221and receiving data from the agent program 100 when data transmission,wireless communication or the like is carried out via a network such asa local area network (LAN). The communication controller 210 also has afunction of transmitting data to the agent program 100 according to arequest from the event generator 242.

The data collection/management module 220 includes the data collector221, the data collecting object manager 222 and the data collectioninterval manager 223.

The data collecting object manager 222 has information on the agentprogram of an object from which data is to be collected. When aplurality of agent programs are present for the manager program 200 on anetwork via a LAN, it is assumed that the data collecting object manager222 selects one of the agent programs of the object for data to becollected therefrom.

In this connection, the agent program information may be any of thefollowing information or the other information.

-   -   Identifier or title of the agent program.    -   Host name, MAC address or IP address of a computer to be        operated by the agent program.    -   Information (title, volume name, port number, WWN (world wide        name), performance information, etc.) on a storage of a computer        operated by the agent program.    -   Information (DBMS (data base management system), OS, Web server        program, application program or the like) on a program using a        file stored in a storage of a computer operated by the agent        program.    -   Port number used for a computer operated by the agent program.    -   IP address of the manager program of the agent program for data        transmission and reception.

The data collection interval manager 223 has information about timeinterval at which the manager collects data from the agent program to bemonitored. On the basis of the data collection time-interval informationpossessed by the data collection interval manager 223, the managerprogram 200 issues a request to transmit data possessed by the agentprogram from the agent program 100 to the manager program at regularintervals.

The acquired data time information manager 224, which has timeinformation of data stored in the data storage 230, has a function ofupdating the acquired time information according to data transmittedfrom the data storage 130.

The data collector 221 has a function of collecting data on the basis ofinformation possessed by the data collecting object manager 222 and datacollection interval manager 223, and also has a function of demandingdata not stored yet in the data storage 230 of the data storage 130 onthe basis of the information of the acquired data time informationmanager 224.

The data change information management module 240 has the data changedetector 241 and the event generator 242.

The data change detector 241 has a function of comparing data acquiredfrom the data storage 130 with data acquired from the data storage 130.

The data change detector 241 has a function of judging the presence orabsence of a change in the capacity information, used capacityinformation, the value of free capacity information, etc. (which will bereferred to as capacity type data or information, hereinafter) of thedata acquired from the data storage 130.

In this connection, when the data change detector 241 judges thepresence or absence of a change in the acquired information, thedetector may determines the presence of a change in the information whenfinding a difference between N-th acquired information and (N+1)-thacquired information, or may judge the presence or absence of aninformation change by using another method.

The data collector 221 has a function of storing data corresponding to achange in the data storage 230 when the data change detector 241 detectsthe change in the capacity type data.

The data collector 221 functions to update the time information of datastored in the data storage 230 when the data change detector 241 detectsthe absence of a change in the capacity type data. The data collector221 also functions to discard the data without being stored in the datastorage 230 when the data change detector 241 detects the absence of achange in the capacity type data.

The event generator 242 has a function of generating a data collectioninterval enlarging event for the data collection interval manager 123 ofthe agent program 100 when the data change detector 241 detects theabsence of a change in the capacity type data.

The event generator 242 of the manager program generates an eventaccording to information received from the agent program. The eventincludes information which follow. These information, however, are givenas an example and thus other information for use in the monitoring orcollection of performance information may be used as an event.

-   -   Data collection interval change flag.    -   IP address of a computer operated by the program as a        destination.    -   Port number for the program to use in transmission and reception        of data.

For example, an event when a flag for shortening a data collectioninterval is “0”, a flag for enlarging the data collection interval is“1”, an IP address is “111.222.33.4”, and a port number is “8080”,includes exemplary information which follows. (In this connection, thecontents of the data collection interval change flags may be previouslydefined in the agent program and manager program.)

|0|1111.222.33.4|8080| . . . Example of Data Collection IntervalEnlarging Event

How the manager program 200 acquires and processes data held in theagent program 100 will be explained in detail by referring to aflowchart of FIG. 9.

The data storage 230 has a function of transmitting the data of the datastorage 230. How the data of the agent program acquired by the datacollector 221 is stored in the data storage 230 will be explained indetail in connection with its example with use of FIG. 6.

Shown in FIG. 3 is an example of a structure of a host to be monitored.

A host 300 to be monitored includes a user program 310, a file system320, a volume management module 330, an input/output generation detector331, an event generator 332, an operation system 340, a driver 350, anumber of input/output operations threshold manager 351, a number ofinput/output operations over-threshold detector 352, an event generator353, and a disk unit 360.

The user program 310 has a function of operating a program defined by auser.

The file system 320 has information for managing a disk connected to thehost to be monitored (a computer such as a server) or a storage to beused by a server via a network.

The file system is used for a disk or the like connected to the server.Thus the operation system can manage the capacity information, usedcapacity information, free capacity information, the number of recordedfiles, file owner, file write authority, file read authority, and fileexecution authority of the disk included in the file system.

The disk capacity monitoring device can monitor the capacity typeinformation of the disk connected to the server using a function offeredby the operation system.

The volume management module 330 has an input/output generation detector331 and an event generator 332. The word “volume” as used herein refersto one of disks connected to a server and having divided sections ofsuitable sizes. The volume may also refer to a storage area of varioustypes of storages not connected directly to a server. For example, thevolume may refer to an area of a storage usable by a computer via astorage area network (SAN) or may refer to another type of area.

The input/output generation detector 331 has a function of monitoring adisk area having the capacity type information possessed by the filesystem stored therein and detecting an occurrence of input or output.

When the input/output generation detector 331 detects an occurrence ofan input or output to or from the disk area having the capacity typeinformation of the file system stored therein, the event generator 332has a function of generating a data collection interval shortening eventto the data collection interval manager 123 of the agent program 100.

The operation system 340 functions to provide a common function utilizedby the user program 310 to manage the entire server.

The driver 350 has a number of input/output operations threshold manager351, a number of input/output operations over-threshold detector 352,and an event generator 353.

The driver has a function of causing the operation system to operateperipheral devices.

The number of input/output frequency threshold manager 351 has afunction of managing threshold values of an input/output frequency andtime information of an internal clock within the server as parameters.

The number of input/output operations over-threshold detector 352 has afunction of detecting the fact that the input/output operations to/fromthe disk to be managed by the driver exceeded the threshold value.

When the number of input/output operations over-threshold detector 352detected the fact that the input/output operations to/from the disk tobe managed by the driver exceeded the threshold value, the eventgenerator 353 has a function of generating a data collection intervalshortening event to the data collection interval manager 123 of theagent program 100.

The disk unit 360 indicates disks to be monitored by the driver 350.

The disk unit 360 is controlled under control of the operation system340 using the function of the driver 350.

FIG. 4 shows an example of a structure of a client program.

A client program 400 has a communication controller 410, a datacollector 420 and a data display 430.

The communication controller 410, which is connected to a local areanetwork (LAN), has a function of transmitting or receiving data.

The data collector 420 has a function of issuing a request to the datastorage 230 of the manager program 200 to transmit data to the clientprogram 400.

The data display 430 has a function of displaying data transmitted fromthe data storage 230 of the manager program 200.

FIG. 5 shows an example of data stored in the data storage 130 of theagent program 100. The data are stored in a resource column 510, acapacity column 520, a used capacity column 530, a free capacity column540 and a time column 550.

Stored in the resource column 510 are file system names acquired by theagent program 100 using the function of the operation system 340. Inthis connection, the type name, volume name or identifier of a storagedevice may be used as the resource name.

Stored in the capacity column 520 are the capacity information of thefile systems acquired by the agent program 100 using the function of theoperation system 340.

Stored in the used capacity column 530 are used capacity information ofthe file systems acquired by the agent program 100 using the function ofthe operation system 340.

Stored in the free capacity column 540 are free capacity information ofthe file systems acquired by the agent program 100 using the function ofthe operation system 340.

Stored in the time column 550 are time information of the internal clockpossessed by the server, based on which the agent program operates whenthe agent program 100 acquires the data in the resource column 510,capacity column 520, used capacity column 530 and free capacity column540 using the function of the operation system 340.

Data collected by the data collector 121 of the agent program 100 aresequentially stored in the data storage 130 together with timeinformation for each of the data. Accordingly, even when no change takesplace in the acquired capacity type information, the acquired data arestored in the data storage 130 together with time information. In theexample of FIG. 5, there is no change in the capacity type informationof from “2003/01/13 05:00 to “2003/01/13 07:00”, but the data aresequentially stored in the data storage 130.

FIG. 6 shows an example of data of the data storage 130 stored in thedata storage 230 when the data storage 130 is in such a state as shownin FIG. 5.

Data are stored in a resource column 610, a capacity column 620, a usedcapacity column 630, a free capacity column 640, a start time column 650and an end time column 660, which columns will be explained below.

Stored in the resource column 610 are information of the resource column510 acquired by the manager program 200 from the data storage 130 of theagent program 100.

In this case, however, it is featured that, when the acquired resourcename of the resource column 510 is the same as the resource nameacquired at the previous time and when the data change detector 241 ofthe manager program 200 detects the fact that there is no change in anyof the data of the capacity column 520, used capacity column 530 andfree capacity column 540 acquired by the manager program 200 from thedata storage 130 of the agent program 100; the data of the resourcecolumn 510 is not stored in the resource column 610.

Stored in the capacity column 620 are information of the capacity column520 acquired by the manager program 200 from the data storage 130 of theagent program 100.

In this case, however, it is featured that, when the resource name ofthe resource column 510 is the same as the resource name acquired at theprevious time and when the data change detector 241 of the managerprogram 200 detects the fact that there is no change in any of the datain the capacity column 520, used capacity column 530 and free capacitycolumn 540 acquired by the manager program 200 from the data storage 130of the agent program 100; the data of the capacity column 520 is notstored in the capacity column 620.

Stored in the used capacity column 630 are information of the usedcapacity column 530 acquired by the manager program 200 from the datastorage 130 of the agent program 100.

In this case, however, when the resource name of the resource column 510is the same as the resource name acquired at the previous time and whenthe data change detector 241 of the manager program 200 detects the factthat there is no change in any of the data in the capacity column 520,used capacity column 530 and free capacity column 540 acquired by themanager program 200 from the data storage 130 of the agent program 100;the data of the used capacity column 530 is not stored in the usedcapacity column 630.

Stored in the free capacity column 640 are information of the freecapacity column 540 acquired by the manager program 200 from the datastorage 130 of the agent program 100.

In this case, however, it is featured that, when the resource name ofthe resource column 510 is the same as the resource name acquired at theprevious time and when the data change detector 241 of the managerprogram 200 detects the fact that there is no change in any of the datain the capacity column 520, used capacity column 530 and free capacitycolumn 540 acquired by the manager program 200 from the data storage 130of the agent program 100; the data of the free capacity column 540 isnot stored in the free capacity column 640.

Stored in the start time column 650 are information of the time column550 acquired by the manager program 200 from the data storage 130 of theagent program 100.

In this case, however, it is featured that, when the resource name ofthe resource column 510 is the same as the resource name acquired at theprevious time and when the data change detector 241 of the managerprogram 200 detects the fact that there is no change in any of the datain the capacity column 520, used capacity column 530 and free capacitycolumn 540 acquired by the manager program 200 from the data storage 130of the agent program 100; the data of the time column 550 is not storedin the start time column 650.

Stored in the end time column 660 are time information at which datacollection ends. In this case, one of the end times is “9999/12/3123:00” as an example.

In this case, however, it is featured that, when the resource name ofthe resource column 510 is the same as the resource name acquired at theprevious time and when the data change detector 241 of the managerprogram 200 detects the fact that there is no change in any of the datain the capacity column 520, used capacity column 530 and free capacitycolumn 540 acquired by the manager program 200 from the data storage 130of the agent program 100; the data of the time column 550 is not storedin the end time column 660.

Explanation will next be made in detail in connection with an examplewherein data are stored into the data storage 230 of the manager programfrom the data storage 130 of the agent program under control of themanager program 200.

Since the data of from “2003/01/13 05:00” to “2003/01/13 07:00” storedin the data storage 130 cause no change in the capacity typeinformation, it is represented by one line in the data storage 230. Whenthe next line is not present in the data storage 230, a value indicativeof an end time is stored in the end time column of the data storage 230.The data of the end time column is updated to designated time data whenthe next line is added.

Since the data of “2003/01/13 08:00” causes a change in the usedcapacity and free capacity information, a line is added in the datastorage 230 to store the data. At this time, the end time column of theprevious-line data is updated to “2003/01/13 07:00”.

Since the data of “2003/01/13 10:00” causes a change in the capacity andfree capacity information, a line is added in the data storage 230 tostore the data. At this time, the end time column of the previous-linedata is updated to “2003/01/13 09:00”. Since the next line is notpresent, the end time column is “9999/12/31 23:00”.

FIG. 7 shows a flowchart for explaining a flow of operations of thevolume management module 330.

It is assumed in this case that the system can monitor an input oroutput to or from a disk area having capacity type information of thefile system stored therein under control of the volume managementmodule.

The volume management module detects an occurrence of an input or outputto or from the disk area having the capacity type information of thefile system stored therein (step 710), generates a data collectioninterval shortening event (step 720), and informs the data collectioninterval manager 123 of the agent program 100 of the generated event(step 730).

A flowchart of FIG. 8 explains a flow of operations of the driver 350.

It is assumed in this example that, even when an input or output to orfrom the disk area having the capacity type information of the filesystem stored therein cannot be monitored by the volume managementmodule, the system of the performance information can monitor aninput/output frequency to or from the disk to be managed by the driver.

It is also assumed that a means for monitoring the input/outputfrequency to/from the disk to be managed by the driver is an alternativeto the means for monitoring an input or output to or from the disk areahaving the capacity type information of the file system stored thereinunder control of the volume management module.

The driver detects the fact that an input/output frequency to/from adisk to be managed by the driver (step 810), generates a data collectioninterval shortening event (step 820), and informs the data collectioninterval manager 123 of the agent program 100 of it (step 830).

FIGS. 9 and 10 show flows of operations of the data collection intervalmanager 123 of the agent program 100.

It is assumed that the data collection interval manager 123 of the agentprogram 100 has information about a minimum and maximum of the datacollection interval of the agent program 100.

The data collection interval manager receives a data collection intervalshortening event from the event generator 332 of the volume managementmodule 330 or from the event generator 353 of the driver 350 (step 910),and decreases the data collection interval value by a predeterminedamount when a current data collection interval is larger than theminimum value (step 920) (step 930).

In this connection, a predetermined value for narrowing the datacollection interval as well as a predetermined value for widening thedata collection interval may be previously determined by a systemadministrator and be stored in the storage. The same holds true even forthe minimum and maximum of the data collection interval.

The data collection interval manager receives a data collection intervalshortening event from the event generator 332 of the volume managementmodule 330 or from the event generator 353 of the driver 350 (step 910),and not changes the data collection interval but holds the current setvalue when the current data collection interval is not larger than theminimum value (step 920) (step 940).

The data collection interval manager fails to receive a data collectioninterval shortening event from the event generator 332 of the volumemanagement module 330 or from the event generator 353 of the driver 350(step 910), receives a data collection interval enlarging event (step1010), and sets the data collection interval value to be larger by apredetermined value (step 1030) when the current data collectioninterval value is smaller than the maximum value (step 1020).

The data collection interval manager fails to receive a data collectioninterval shortening event from the event generator 332 of the volumemanagement module 330 or from the event generator 353 of the driver 350(step 910), receives a data collection interval enlarging event (step1010), and not changes the data collection interval value but holds thecurrent value (step 1040) when the current data collection intervalvalue is not smaller than the maximum value (step 1020).

When failing to receive a data collection interval shortening event fromthe event generator 332 of the volume management module 330 or from theevent generator 353 of the driver 350 (step 910) and also failing toreceive a data collection interval enlarging event (step 1010); the datacollection interval manager not changes the data collection intervalvalue but holds the current value (step 1040).

FIGS. 11 and 12 show flows of operations of the manager program 200.

The manager program determines a range of time data to be acquired bythe acquired data time information manager 224 (step 1110), acquiresnot-acquired data from the data storage 130 (step 1120), updatesacquired data time information at the acquired data time informationmanager 224 (step 1130), and stores the acquired data in the datastorage 230 when the data corresponds to the first-time data for anagent to be monitored (step 1140) (step 1160).

The acquired data time information manager 224 determines a range oftime data to be acquired (step 1110).

The manager program acquires not-acquired data from the data storage 130(step 1120), and updates the acquired data time information at theacquired data time information manager 224 (step 1130). When theacquired data is not the first-time data for the agent to be monitored(step 1140) and when the data change detector 241 judges the presence orabsence of a change in the acquired data (step 1150) and determines thepresence of a change in the capacity type data of the acquired data(step 1210), the manager program stores the acquired data in the datastorage 230 and updates the data storage 230 (step 1220).

The manager program determines a range of time data to be acquired atthe acquired data time information manager 224 (step 1110), acquiresnot-acquired data from the data storage 130 (step 1120), and updates theacquired data time information at the acquired data time informationmanager 224 (step 1130). When the acquired data is not the first-timedata for the agent to be monitored (step 1140) and when the data changedetector 241 judges the presence or absence of a change in the acquireddata (step 1150) and determines the absence of a change in the capacitytype data of the acquired data (step 1210); the event generator 242generates a data collection interval enlarging event (step 1230),informs the data collection interval manager 123 of the generated eventvia the communication controller 210 (step 1240), and not stores thedata acquired from the data storage 130 in the data storage 230 butdiscards it (step 1250).

In this way, by immediately detecting a change in the capacityinformation of the server and shortening the data collection interval ofthe agent program, the system can accurately collect data at the time ofoccurrence of a change in the capacity information.

Further, by providing upper and lower limits for the data collectioninterval and determining a prescribed value for the data collectioninterval, the system can control a load caused by data collection andcan arrange granularity of data to be collected to be uniform. Since thegranularity of data is arranged to be uniform, the system can display aplurality of pieces of collected data in such a manner that the user caneasily see them. In addition, since the data collection interval has itsupper limit, information collection can be done at intervals of aconstant time. Thus the system administrator also can confirm whether ornot a computer as a destination of the data collection is operated.

Another embodiment will be explained by referring to FIGS. 13 to 16.

FIG. 13 shows an example of an entire system.

A computer 1300 and a computer 1301 are connected to the Internet 1303.The aforementioned computer or portable terminal 1302 performs datatransmitting and receiving operations to and from a Web server.

In a computer 1304, an agent program 1305 and a Web server A 1306 as aserver program are operated.

In a computer 1307, an agent program 1308 and a Web server B 1309 as aserver program are operated.

In a computer 1310, an agent program 1311 and an AP server 1312 as anapplication server program are operated.

In a computer 1313, an agent program 1314 and a DBMS_A 1315 as a DBMSare operated.

In a computer 1316, an agent program 1317 and a DBMS_B 1318 areoperated.

In a computer 1319, a manager program 1320 is operated.

Each of the computers issues an instruction as necessary to perform datawriting and reading operations over storage units 1322 and 1323 such asdisplay arrays connected to a storage area network (SAN) or over a tapeunit 1325 connected to a computer 1324.

When a user utilizes a Web service using the computer 1300, a requestdata from the user is transmitted from the server A 1306 receiving theuser's request to the AP server 1312, and further from the AP server tothe DBMIS A 1315. The DBMIS A 1315 in turn issues an access request tothe storage unit 1322 or the like via the SAN.

In this connection, though not illustrated, an apparatus such as eachcomputer has an OS function of performing necessary operations. Further,a computer for the manager program to monitor may have such a programfunction as a driver or volume management module as necessary.

FIG. 14A is an example of display screen representation.

A configuration of an entire system is displayed in the form of a treestructure in a window of a management objective entire treerepresentation 1400. The manager program collects necessary information(such as IP address, net mask, host name, etc. for each computer) bypolling the agent program at regular intervals, and displays informationabout the system configuration on the basis of the collectedinformation.

In this example, an entire network 1401 is represented as a root, andsubnets 1402 and 1407 and computers 1403 and 1408 are represented asdirectories thereof. When the computer 1403 has a host name of “Host_A”and an IP address of “111.222.41.32”, further, the computer may also berepresented by “Host_A 111.222.41.32” as illustrated. When a net mask is“255.255.255.0” and a server IP address is “111.222.41.32”, a subnet maybe represented by “111.222.41.0”.

Reference numerals 1403, 1404, 1405 and 1406 denotes a computer andvolume names (or drive names) managed by the computer which are shown inthe form of a tree structure as associated with each other. The samesimilarly holds true even for reference numerals 1408, 1409, 1410 and1411.

Volume names designated by the user are represented in a tree form inthe window of a user-designated tree representation 1412. Therepresentation is displayed based on information about a user-designatedgroup, which will be explained with reference to FIG. 14B.

In the window of a system alarm tree representation 1430, when the valueof a disk performance such as a used capacity or free capacity for thedisk exceeds a threshold value, the volume name of the associated diskand the name of the computer for managing the volume are displayed asassociated with each other.

To a root 1418, date information when the performance information of thedisk volume exceeds the threshold value, an item name of the performanceinformation exceeding the threshold value, etc. may be given as itsname. Further, the name or identifier of the disk volume having thevalue exceeding the threshold value and a computer for managing the diskvolume are represented as associated with each other. Detailed contentswhen the disk volume exceeded the threshold value are exemplified byreference numerals 1419, 1420 and 1421. In this case, the case when diskused capacity exceeded the threshold value is illustrated as an example.The contents of threshold value and alarm message will be explained withreference to FIG. 15.

In the window of the system alarm tree representation 1430, not only avolume exceeding a threshold value but also a volume name, host name,etc. associated with the exceeded-threshold volume are represented,examples of which are denoted by reference numerals 1422 and 1423.

For example, such a case that a DBMS is using a volume having a volumename “/DBMS_A” managed by a computer having a host name “Host_D” and thevolume name exceeds its threshold value (when the volume use stateinformation satisfies predetermined conditions), is assumed.

In this case, assume that an event for shortening a data collectioninterval is transmitted to the manager program at the same time as thevolume having the volume name “/DBMS_A” exceeds the threshold value ofuse amount and an event for shortening a data collection interval for avolume having a volume name “/A/WebServerProg_A” is transmitted from theagent program operated by the computer having the host name “Host_A” tothe manager program. Then the system judges that the both are associatedwith each other and displays the both in the window of the system alarmtree representation.

In the window of the system alarm tree representation, the treerepresentation may be carried out only for a constant time from the timepoint when the volume exceeded the threshold value, after which the treerepresentation may be erased while leaving an alarm message, or thedisplay representation may be erased and data information may be savedin a log file.

In the example of FIG. 14A, the volume 1402 having the value exceedingthe threshold as well as items 1419, 1422, 1423, 1403, 1406, 1408, 1411,1414 and 1415 associated with the volume are displayed as highlighted inthe respective windows.

In this way, since not only the volume exceeding the threshold value butitems associated therewith are also displayed as highlighted, volumemanagement can be realized, taking the entire system configuration intoconsideration. Further, items designated by the user are displayed, theitems can also be monitored for each of volumes designated by the user(system administrator). Even with regard to an item not designated bythe user as a monitoring object, if it is necessary to issue an alarm tothe administrator for the item, then it can be displayed to be easy tounderstand it on the system alarm tree representation screen.

FIG. 14B is an example of information of a user-designated group.

The user-designated group information include a user-designated groupname 1450, host name or agent name 1451, volume name 1452 andperformance information display designation 1453 associated with eachother.

For these information, an item designation menu may be provided in thewindow of FIG. 14A and information accepted by user input may be storedin the menu, or information entered on a command line may be storedtherein.

When a single agent program is operated in each computer, informationbelonging to a group may be managed by a host name. Further, when aplurality of agent programs are operated in a single computer or whenmanaged volumes are different for different agents operated by the samecomputer, the information management may be carried out by theidentifiers or names given to the agent programs.

In this connection, information may be designated or designated by theuser who enters or inputs an object name (resource name) such as anagent name to be grouped and the name of the group to on a command line.For example, such an input can be employed.

Command for Execution of Group [resource name] [group name]

Further, the group designation may be carried out by the user whodesignates the agent, server or volume represented in a tree form withuse of a mouse pointer or the like on the basis of information (such asan agent name or host name transferred between the agent program andmanager program) managed by the manager program.

The group information stored in the storage is used in such a mannerthat, when an event or performance information was transmitted fromanother computer (or agent program) to the manager program, the managerprogram judges whether or not a computer (or agent program) whichtransmitted the event or performance information belongs to the groupinformation, and on the basis of its judgment result, it transmitsnecessary information to a computer belonging to the same group.

For example, when the system administrator wants to monitor performanceinformation relating to a plurality of Web server programs, theadministrator designates the plurality of Web server programs as agroup. When a number of input/output operations to/from a storage usedby one of the Web server programs belonging to the group is increased,the administrator can issue such an instruction as to change thecollection interval of performance information for the volume used bythe Web server program belonging to this group. When the volume exceedsits threshold value, the performance information of the volume belongingto the group can be displayed as associated therewith on the screen.

The designation of the displayed performance information is an exampleof designation of performance information items to be provided for theuser. In the illustrated example, a free capacity 1454, used capacity1455, device detail 1456, and I/O 1457 with respect to the disk volumeare enumerated as an example, but other items may be used.

In this example, since item representation or non-representation isdesignated for each volume, information can be displayed in detail foreach volume. A method for displaying these items may be, when the volumeexceeds the threshold value, to display it using a popup window, oranother method may be employed.

FIG. 15 is an example of information relating to system configuration,volume name and threshold value associated with each other.

The system configuration information includes a subnet 1500 and a hostname 1501. In this connection, the host name may be replaced by the nameof the agent program or the identifier of the agent program. Theseinformation are exemplary information to be managed by the managerprogram on the basis of information received from the agent program, butinformation except for these information may be managed. Further, themanager program collects and manages information from the agent programat regular intervals. Thus, even when the system configuration ischanged, information managed by the manager program may be designed tobe updated.

In this example, a threshold value 1503 is set for each volume as anexample. As the threshold value, the system administrator may previouslyset a predetermined value for a free capacity 1504 or used capacity 1505of each volume according to the volume. Further, an alarm message 1506is set for each volume by the system administrator.

FIG. 16 is an example of operations of the manager program.

The manager program receives an event from the agent (step 1610).

The manager program judges whether or not the identifier (such as a hostname) of a computer included in the received event and operated by theagent is included in the group information (see FIG. 14B) (step 1620).

When determining that the computer identifier is included in the groupinformation, the manager program transmits the event to a host operatedby an agent belonging to the same group as the identifier of thecomputer operated by the agent included in the received event (step1630).

The manager program judges whether or not the agent which transmittedthe event in the step 1610 manages a volume exceeding a threshold value(step 1640). The judgment may be carried out by acquiring informationabout storage from the host to which the agent transmitted it, oranother judgment method may be employed.

When determining in the step 1640 that the agent manages the volumeexceeding the threshold value, the manager program judges a datacollection interval change flag included in the event (step 1650). Ifthe judgment result is “0”, then the manager program searches for anddisplays associated items on the basis of the event acquired from theagent program or information obtained by polling the agent program atregular intervals (step 1660). In this connection, this operation is anexample when the flag for shortening a data collection interval includedin the event is “0”, and thus other operation may be employed.

The manager program judges whether or not window-associated items aredisplayed and, according to the judgment result, the manager programdisplays information of tree-represented items in a highlighted manneror displays an alarm message (step 1670). At this time, if informationof use state of the volume corresponding to the volume name representedin the window satisfies predetermined conditions, then the managerprogram display the volume name in a highlighted manner. Further, notonly the volume name but items associated therewith are also displayedas highlighted.

When the volume satisfying the predetermined conditions and volumesassociated therewith are judged and representation of the associatedvolumes is changed in the step 1670, its judgment may be made by themanager program using a previously-stored event or the received event.

For example, if events past accumulated have data having a predeterminedtendency with time, the manager program can display these events and thevolume under management of a computer operated by the agent programwhich transmitted these events as associated therewith. As an example,when performance information transmitted from the agent program whichmanages a volume name “/DBMS_A” to the manager program as well asperformance information transmitted from the agent program which managesa volume name “/A/WebServerProg_A” to the manager program changes in theused capacity at an identical time point (for example, 2003/01/1410:00), volumes corresponding to the two volume names (“/DBMS_A” and“/A/WebServerProg_A”) can be judged as associated items.

Further, when the manager program acquires past data stored on a timeseries basis from the respective agent programs and when some of thetime-series past data have the same data change tendency (e.g., when thecapacity of a volume changes one hour later from a time at which thecapacity of another volume changes at intervals of one day), the managerprogram can judge these data as associated items. Of course, it goeswithout saying that another method can be employed to judge and displaya volume exceeding a threshold value and a device associated with thevolume.

With regard to the display of these information, information offered bythe manager program may also be displayed using a browser or the likeoperated by a portable terminal or computer or by other means.

In this way, when data about a volume to be monitored is changed, theperformance information collecting function can be used to judge thedata and items associated therewith. As a result, there is provided aninterface which can display performance information taking theinfluences on associated systems or storages into consideration.

Further, since changed information is judged and displayed on thescreen, the system administrator (user) can easily grasp a change in theuse state or performance information.

When the present invention is used in this way, performance informationfor the user to be able to easily understand can be offered.

It should be further understood by those skilled in the art thatalthough the foregoing description has been made on embodiments of theinvention, the invention is not limited thereto and various changes andmodifications may be made without departing from the spirit of theinvention and the scope of the appended claims.

1-2. (canceled)
 3. A screen displaying method using a first computer, comprising the steps of: displaying a host name of a second computer and a volume name of a volume managed by said second computer on said first computer on the basis of information acquired from said second computer; receiving information about a use state of the volume managed by said second computer from said second computer; and displaying as highlighted the volume name of the volume when the information of the use state of the volume corresponding to said displayed volume name satisfies predetermined conditions.
 4. The method as set forth in claim 3, wherein said volume use-state information includes at least one of a volume capacity, a volume used capacity, and a volume free capacity.
 5. A program implemented by a computer for displaying performance information on a display screen of a first computer, said program comprising: a process for displaying a host name of a second computer a volume name of a volume managed by said second computer on the basis of information acquired from the second computer; a process for receiving information about a use state of the volume managed by said second computer from the second computer; a process for judging whether or not the information of the use state of the volume corresponding to said displayed volume name satisfies predetermined conditions; and a process for changing a display of the volume name corresponding to the volume according to said judgment result.
 6. The program as set forth in claim 5, wherein said predetermined conditions include any one of a volume used capacity and a volume free capacity. 7-10. (canceled)
 10. A performance information displaying system using a first computer comprising: means for displaying a host name of a second computer and a volume name of a volume managed by said second computer on the basis of information acquired from the second computer; means for receiving information about a use state of the volume managed by said second computer; and means for highlightedly displaying the volume name corresponding to the volume when the information of the use of the volume corresponding to said displayed volume name satisfies predetermined conditions. 